The Collaborative International Dictionary
Cytisus alpinus
Laburnum \La*bur"num\, n. [L.] (Bot.) A small leguminous tree ( Cytisus Laburnum), native of the Alps. The plant is reputed to be poisonous, esp. the bark and seeds. It has handsome racemes of yellow blossoms.
Note: Scotch laburnum ( Cytisus alpinus) is similar, but has smooth leaves; purple laburnum is Cytisus purpureus.